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>From: surfer@prairieweb.com
>When I rebuilt the engine in my '71 fastback I ordered some rebuilt heads.
>When I bought them I didn't know much about VW engines so I confided in the
>salesman over the phone who said "as long as they were dual port they will
>fit". Well needless to say I put every thing together and close to
>completion I went to attatch the temp sensor and found no hole. So I
>embedded it between the sheet metal and the head and it works untill the
>engine gets hot and then the engine stalls.
>I tried to attatch it to the exaust where it comes out of the head with a
>hose clamp, but that doesn't seem to work either. Tapping a hole into the
>head seemes risky and would be impossible without removing the engine.
>How can I solve this dilemma? Am I truely stuck?
The sensor needs both intimate thermal contact and continuous electrical
contact. Most heads have no place to put it, although some replacement
heads have the cast bosses there but not tapped. Keep in mind that 68-9
cars have the boss below the #4 exhaust valve while the later cars have it
behind the #4 spark plug. I don't think there is any real way you can use a
head that doesn't have at least one of the bosses.
Trying to hose clamp it might get you good electrical contact, but it can be
MUCH cooler mounted like that than the intended spot. It's just that
aluminum is a much better thermal conductor than air.
I realize that this is a major blow, but unless there is a boss there that
you could drill/tap I think you are going to have to bite the bullet and
back up and do this right. Welcome to the learning curve.
Jim
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Melissa Kepner Jim Adney
jadney@vwtype3.org jadney@vwtype3.org
Laura Kepner-Adney
Madison, Wisconsin
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